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RGraph is a JavaScript charts library based on HTML5 SVG and canvas. RGraph is mature (over 15 years old) and has a wealth of features making it an ideal choice to show charts on your website.

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The fillRect function

The fillRect function is used for drawing rectangles on your canvas. As the name would suggest it does not stroke them (ie it doesn't draw the outline) - only drawing the filled rectangle. An important thing to remember is that it's not a path function - so you don't have to call the fill function - when you call the fillRect function it immediately draws a filled rectangle on your canvas. It uses the fillStyle setting for the color to use.

Arguments to the function


An example

<script>
    window.onload = function ()
    {
        var canvas  = document.getElementById("cvs");
        var context = canvas.getContext('2d');

        var x      = 50;
        var y      = 50;
        var width  = 100;
        var height = 100;
    
        context.fillStyle = 'red';
        context.fillRect(x, y, width, height);
    }
</script>